Datasheet

7Maxim Integrated
1.2A Switch-Mode Li+ Chargers with ±22V Input
Rating and JEITA Battery Temperature Monitoring
MAX8900A/MAX8900B/MAX8900C
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 6V, V
BAT
= 4V, R
SETI
= 2.87kI, R
DNI
= 3.57kI, V
THM
= V
AVL/2
, circuit of Figure 1, T
A
= -40NC to +85NC, unless otherwise
noted. Typical values are at T
A
= +25NC.) (Note 2)
Note 2: Parameters are production tested at T
A
= +25NC. Limits over the operating temperature range are guaranteed through
correlation using statistical quality control (SQC) methods.
Note 3: Contact factory for alternative values.
Note 4: V
IN
must be greater than V
UVLO-RISING
for the part to operate when CEN is pulled low. For example, if CEN is low and the
MAX8900_ is operating with V
UVLO-FALLING
< V
IN
< V
UVLO-RISING
, then toggling CEN results in a nonoperating condition.
Note 5: Guaranteed by design, not production tested.
Note 6: When the charger is in its DONE state, it restarts when the battery voltage falls to the charger restart threshold. The battery
voltage that causes a restart (V
BAT-RSTRT
) is V
BAT-RSTRT
= 4.2V - V
RSTRT
. For example, with the MAX8900A, V
BAT-RSTRT
= 4.2V - 100mV = 4.1V.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
STATUS OUTPUTS (STAT1, STAT2, STAT3)
STAT1 and STAT2 Output
Voltage Low
I
SINK
= 1mA 0.025 0.05
V
I
SINK
= 15mA 0.38
STAT1 and STAT2 Output High
Leakage
V
STAT_
= 28V
T
A
= +25NC
0.001 1
FA
T
A
= +85NC
0.01
STAT3 Output Voltage Low
I
SINK
= 1mA 0.01
V
I
SINK
= 15mA 0.15 0.25
STAT3 Output High Leakage V
STAT3
= 5.5V
T
A
= +25NC
0.001 1
FA
T
A
= +85NC
0.01
PVL AND AVL
PVL and AVL Output Voltage
0 to 30mA internal load, V
IN
= 6V,
T
A
= 0NC to +85NC
4.6 5.0 5.1 V
0 to 23mA internal load, V
IN
= 6V,
T
A
= -40NC to +85NC
THERMAL
Thermal Regulation Temperature T
REG
Junction temperature when charge current
is reduced
95
NC
Thermal Regulation Gain T
TREG
The charge current is decreased 6.7% of
the fast-charge current setting for every
degree that the junction temperature
exceeds the thermal regulation temperature
6.7
%/NC
Thermal-Shutdown Temperature T
SHDN
Junction temperature rising, 15NC hysteresis
+155
NC